12 October 2011 Toward active x-ray telescopes
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Future x-ray observatories will require high-resolution (< 1") optics with very-large-aperture (> 25 m2) areas. Even with the next generation of heavy-lift launch vehicles, launch-mass constraints and aperture-area requirements will limit the areal density of the grazing-incidence mirrors to about 1 kg/m2 or less. Achieving sub-arcsecond x-ray imaging with such lightweight mirrors will require excellent mirror surfaces, precise and stable alignment, and exceptional stiffness or deformation compensation. Attaining and maintaining alignment and figure control will likely involve active (in-space adjustable) x-ray optics. In contrast with infrared and visible astronomy, active optics for x-ray astronomy is in its infancy. In the middle of the past decade, two efforts began to advance technologies for adaptive x-ray telescopes: The Smart X-ray Optics (SXO) Basic Technology project in the United Kingdom (UK) and the Generation-X (Gen-X) concept studies in the United States (US). This paper discusses relevant technological issues and summarizes progress toward active x-ray telescopes.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stephen L. O'Dell, Carolyn Atkins, Timothy W. Button, Vincenzo Cotroneo, William N. Davis, Peter Doel, Charlotte H. Feldman, Mark D. Freeman, Mikhail V. Gubarev, Jeffery J. Kolodziejczak, Alan G. Michette, Brian D. Ramsey, Paul B. Reid, Daniel Rodriguez Sanmartin, Timo T. Saha, Daniel A. Schwartz, Susan Trolier-McKinstry, Rudeger H. T. Wilke, Richard Willingale, William W. Zhang, "Toward active x-ray telescopes", Proc. SPIE 8147, Optics for EUV, X-Ray, and Gamma-Ray Astronomy V, 81471Q (12 October 2011); doi: 10.1117/12.896458; https://doi.org/10.1117/12.896458


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